Solid parquet hardwood flooring can be glued directly to a concrete slab on grade or above grade with the use of a manufacturer recommended vapor retarder.
Timber overlay flooring on concrete.
Prepare by sanding down to clean bare wood.
It is imperative that you make use of underlayment which can increase the height of the floor by around 40mm.
Replace any weak or water damaged wood.
Wood substrates should have a moisture content no more than 14.
It is supplied in blocks 260mm long x 65mm wide x18mm thick.
Secure loose boards with deck screws and fill open seams with rapid setting polymer modified concrete.
Seal the slab with a waterproofing compound or a plastic membrane under plywood if in doubt or if there is evidence of previous water penetration.
First and foremost you need to make sure that the concrete is in good condition generally.
Solid parquet should not be installed below grade.
What you want to avoid is lumps and bumps in the subfloor that could cause problems to your final look.
The sub floor must be free of deflection l 360 considering both live and dead loads.
Boral overlay is designed to be glued down directly over concrete existing timber flooring or boral plywood as long as the existing floor is clean dry and flat.
A concrete sub floor is in many ways an ideal surface for laying an overlay wood floor.
If you are going to compare installing solid timber flooring on concrete slab relative to a wood subfloor the former is more complicated.
However there are certain points you simply must respect.
Boral overlay is designed to be glued down directly over concrete 80mm width only existing timber plywood or particle board.
Solid overlay timber flooring is a product designed for applications where the beauty style and warmth of a solid timber floor is important but there are limitations on the area s sub floor or the application requires a floor thinner than traditional solid structural timber flooring.
Boral parquetry is a solid hardwood timber flooring product that is designed to be laid directly over a flat and level concrete slab plywood or particleboard flooring.
Metal lath stapled over plywood substrate the installation of calcium aluminate cement based self leveling concrete param 5500 along with expanded metal lath for reinforcement is a successful fast track method to convert a plywood subfloor into a beautiful concrete floor.
Before installing flooring over concrete supporting slabs should be dry with a moisture content no more than 5 5.